CVE-2021-42386
Quick assessment
Affected
busybox busybox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
BusyBox是乌克兰Denis Vlasenko个人开发者的一套包含了多个linux命令和工具的应用程序。 Busybox awk applet 存在资源管理错误漏洞，该漏洞源于在Busybox的awk applet中，在处理nvalloc函数中精心制作的awk模式时，“免费后使用”会导致拒绝服务。攻击者可利用该漏洞导致代码执行。
Possible ATT&CK Techniques 2 AI
T1068 · Exploitation for Privilege Escalation T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-42386
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the nvalloc function
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
BusyBox 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BusyBox是乌克兰Denis Vlasenko个人开发者的一套包含了多个linux命令和工具的应用程序。 Busybox awk applet 存在资源管理错误漏洞，该漏洞源于在Busybox的awk applet中，在处理nvalloc函数中精心制作的awk模式时，“免费后使用”会导致拒绝服务。攻击者可利用该漏洞导致代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-42386
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2021-42386 (1)
Mailing List Discussions for CVE-2021-42386 (1)
Security Blog Posts for CVE-2021-42386 (1)
Other References for CVE-2021-42386 (1)
Same Patch Batch · busybox · 2021-11-15 · 14 CVEs total
| CVE-2021-42385 | BusyBox 资源管理错误漏洞 | |
| CVE-2021-42384 | BusyBox 资源管理错误漏洞 | |
| CVE-2021-42383 | BusyBox 资源管理错误漏洞 | |
| CVE-2021-42382 | BusyBox 资源管理错误漏洞 | |
| CVE-2021-42381 | BusyBox 资源管理错误漏洞 | |
| CVE-2021-42380 | BusyBox 资源管理错误漏洞 | |
| CVE-2021-42379 | BusyBox 资源管理错误漏洞 | |
| CVE-2021-42378 | BusyBox 资源管理错误漏洞 | |
| CVE-2021-42377 | Busybox 安全漏洞 | |
| CVE-2021-42376 | BusyBox 代码问题漏洞 | |
| CVE-2021-42375 | BusyBox 安全漏洞 | |
| CVE-2021-42374 | BusyBox 缓冲区错误漏洞 | |
| CVE-2021-42373 | BusyBox 代码问题漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-42386
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